Explanation

The kilowatt-hour (kWh) is a unit of energy commonly used to measure electricity consumption.

It represents the amount of energy used when a device with a power rating of 1 kilowatt operates for 1 hour. 

Additional information 

Energy/Work: Measured in joules (J).

Charge: Measured in coulombs (C).

Pressure: Measured in pascals (Pa).

Electric current: Measured in amperes (A).

Electric resistance: Measured in ohms (Ω).

Temperature: Measured in kelvin (K).

Torque: Measured in newton metres (N m).

Velocity: Measured in meters per second (m/s).

Acceleration: Measured in meters per second squared (m/s²).

Explanation

λ (lambda) is indeed the decay constant. 

The decay constant, λ "lambda", the reciprocal of the mean lifetime (in s−1), sometimes referred to as simply decay rate
The mean lifetime, τ "tau", is the average lifetime (1/e life) of a radioactive particle before decay.

These are related as follows:

Explanation

Explanation

• Motion is the change in position of an object over time.
• When an object moves from one place to another, it is in motion.

Explanation

A force is a Push or a Pull that causes movement.

Explanation

The phenomenon of refraction of light is the shift in the path of light as it travels from one medium to another

Explanation

As you move toward the center of the Earth, the gravitational force decreases because mass below you exerts less pull.

Therefore, the weight of a body decreases as gravity weakens.

Explanation

One thousand watts of power is called 1.0 kilowatt.

This is because "kilo" denotes a factor of 1,000.

So 1,000 watts equals 1 kilowatt.

Explanation

Ohm's law states that in a closed circuit, current is proportional to the voltage and inversely proportional to the resistance.

This means that as voltage increases, current increases, and as resistance increases, current decreases.

Explanation

The SI unit for flow rate is cubic meters per second (m³/s)